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Stock Options - Additional Information (Details) - USD ($)
12 Months Ended 240 Months Ended
Mar. 07, 2021
Sep. 16, 2020
Mar. 07, 2018
May 01, 2016
May 01, 2015
Aug. 22, 2012
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Nov. 01, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock issued during period, shares, restricted stock award, net of forfeitures     2,000,000              
Common Stock, Par or Stated Value Per Share     $ 0.001       $ 0.001 $ 0.001    
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price             $ 0      
Stock options granted             0      
Stock options outstanding             0 172,500    
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value             $ 202,342,000      
Allocated Share-based Compensation Expense             $ 0 $ 0 $ 7,735,000  
Share-based Compensation Award, Tranche One                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage 60.00%   60.00%              
Share-based Compensation Award, Tranche Two                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     40.00%              
Share-based Compensation Award, Tranche Three                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage     40.00%              
2012 Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock issued during period, shares, restricted stock award, net of forfeitures         729,000          
Share-based compensation arrangement by share-based payment award, options, grants in period, net of forfeitures         1,341,000          
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price         $ 4.98          
Share-based compensation arrangement by share-based payment award, expiration date         Apr. 30, 2023          
Share-based compensation arrangement by share-based payment award, plan modification, description and terms             the board of directors approved that an additional 30% of the Options to be vested on December 16, 2016, and restrictions of an additional 30% of the Restricted Shares were removed on December 16, 2016. On April 25, 2018, the board of directors approved that all remaining unvested Options and Restricted Shares that were granted on May 1, 2015 were fully vested on April 25, 2018.      
2012 Plan | Share-based Compensation Award, Tranche One                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage       20.00%            
2003 Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, expiration date             Nov. 01, 2023      
Stock options granted                   0
2020 ESOP                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Exercise price of options vested, granted to officers and employees   $ 12,000                
Share-based compensation arrangement by share-based payment Award, options vesting period   8 years                
Expected volatility             73.22%      
Expected life             2 years      
Risk-free interest rate             2.72%      
Dividend rate             0.00%      
Stock options granted             0 0    
2020 ESOP | Maximum [Member] | Sinovac LS                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of equity interest right to purchase upon exercise of stock options   15.00%                
Stock options                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, percentage of outstanding Stock maximum             10.00%      
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value             $ 0 $ 0 0  
Stock options | 2012 Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, number of shares authorized           4,000,000        
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options             $ 0      
Stock options | 2012 Plan | Maximum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, expiration period           10 years        
Stock options | 2003 Plan | Maximum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, expiration period             10 years      
Stock options | 2003 Plan and 2012 Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value             $ 0 $ 0 $ 257,000  
Stock options | 2020 ESOP                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Grant date fair value of options issued             7,200,000      
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value             $ 3,000,000      
Stock options | 2020 ESOP | Sinovac LS                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of equity upon exercise of options             15.00%      
Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common Stock, Par or Stated Value Per Share         $ 0.001          
Restricted Stock | 2012 Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Employee service share-based compensation, nonvested awards, compensation not yet recognized, stock options             $ 0